The actress celebrated with Maddox, 16, Pax, 14, Zahara, 13, Shiloh, 12, and 9-year-old twins Knox and Vivienne, at Thorpe Park, an amusement park in South East England on Monday, multiple eyewitnesses tell ET.
"Most people didn’t even recognize her," one eyewitness says. "She seemed so low-key."
While there, Jolie and her six children were spotted riding the Nemesis Inferno roller coaster.
"She seemed really happy! No one was approaching her or asking for photos," a second eyewitness says. "Everyone was respecting her space as she was spending the day out with her children."
Roller coasters clearly appear to be a favorite for the Oscar winner and her kids, as they were later seen riding the Colossus.
"At one point, she had her arm around her daughter, Zahara, and the two of them were having a laugh," the first eyewitness says.
The eyewitnesses also noted that the family had security detail traveling with them throughout the park.